Robot arm



FIG. 1 is a perspective view of a robot arm showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is another perspective view thereof; and,

FIG. 9 is a perspective view of the design in state of use.

The dotted broken lines depict portions of a robot arm in which the design is embodied that form no part of the claimed design.

The dash-dot broken lines define the bounds of the claimed design and form no part thereof. 

CLAIM The ornamental design for a robot arm, as shown and described. 